Leanne Wood is to be challenged for the job of Plaid Cymru leader by one of her fellow Assembly Members with another likely to follow shortly.
Rhun ap Iorwerth has confirmed that he intends to stand in the contest to be held this summer.
The party's rules allow for a contest to be held every two years if members want it. The window for that option closes tonight (Wednesday 4th July).
Ms Wood has been leader of Plaid Cymru since 2012. She's said she will fight the challenge 'with a positive platform' and intends to be First Minister after 2021.
The other likely contender Adam Price hasn't yet said if he will challenge but has urged his party to adopt a co-leadership model.
Rhun ap Iorwerth has set out his reasons for standing in this video that he's tweeted:
At the beginning of the week, Rhun ap Iorwerth and Adam Price, set out some of their ideas about the way the party needs to develop. You can read their articles in full here.
Rhun ap Iorwerth said that the party needs to change to become 'a people- and ideas-driven movement in which those on the left and over towards the centre can feel equally comfortable.'
While Adam Price said that Plaid has 'generally failed to consistently articulate a comprehensive and compelling vision of the future' and that to move forward it should have two leaders in future.
He'd also suggested that he wouldn't challenge if his proposal for Plaid to have two leaders were adopted.
Last night Leanne Wood issued this statement in response to his proposal:
The proposal was discussed by Plaid Cymru AMs in a group meeting yesterday but they decided it should be a matter for members of the wider party.